# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
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from slicc.ast.DeclAST import DeclAST
from slicc.ast.TypeAST import TypeAST
from slicc.symbols import Var
from slicc.symbols import Type

class OutPortDeclAST(DeclAST):
    def __init__(self, slicc, ident, msg_type, var_expr, pairs):
        super(OutPortDeclAST, self).__init__(slicc, pairs)

        self.ident = ident
        self.msg_type = msg_type
        self.var_expr = var_expr
        self.queue_type = TypeAST(slicc, "OutPort")

    def __repr__(self):
        return "[OutPortDecl: %r]" % self.ident

    def generate(self):
        code = self.slicc.codeFormatter(newlines=False)

        queue_type = self.var_expr.generate(code)
        if not queue_type.isOutPort:
            self.error("The outport queue's type must have the 'outport' " +
                       "attribute.  Type '%s' does not have this attribute.",
                       (queue_type))

        if not self.symtab.find(self.msg_type.ident, Type):
            self.error("The message type '%s' does not exist.",
                       self.msg_type.ident)

        var = Var(self.symtab, self.ident, self.location, self.queue_type.type,
                  str(code), self.pairs)
        self.symtab.newSymbol(var)